Pressure indicator and regulator.



w. lvl* voN SICK. PRESSURE INDICATOR AND REGULATOR.

APPLICATION FILED IUNE I5. 1916.

llgl@ Patented. May 8,1917.

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WILLIAM M. VON SCK, 0E LOS ANGELES, CALIFORNIA, ASSIGNOR OF ONE-HALF TODANIEL M. CRITCHLEY.

'BRESSUIRE INDICATOR AND REGULATOR.

. Specication of Letters Patent.

Patented May 8, 1917.

Application led June 15, 1916. Serial No. 103,702.

To all whom t may concern: Be it known that 1, WILLIAM M. VON

SICK, a citizen of the United States, residing at the city of LosAngeles, county of Los Angeles, and State of California, have inventednew and useful Improvements Vin Pressure indicators and Regulators, ofwhich the following is a specification.

My invention relates to pressure ,indica-- A further object is toprovide a device of this character which can be set at` the pressuredesired and which will automatically prevent any excess pressure beingadmitted within the tire or other receptacle.

.l accomplish these and other objects as will appear hereinafter by thedevice described herein a nd illustrated in the accompanying drawingsforming a part hereof in.v

which f device with parts in elevation.

Fig. 2 is-a fragmentary view of a modified form of the pressureregulating portion rious changes in the form and construction thereofmay be made without departing from the spirit of my invention.

1nthe drawings have shown my device in a form adapted for pneumatictires but l do not restrict myself to its use with pneumatic tires orany particular Huid pres- Eig. 1, except that cap nut 10, will be in'sure'1 apparatus but may adapt the same to anyI desired suitable use.

Referring to the drawings 5, represents and' outer casing substantiallyil shaped in ver- VV"ftical longitudinal section in theupper end of thelonger leg of which is formed a spring chamber 6.. The upper endv ofchamber 6, is threaded internally and a gage bar 7, is

in screw threaded engagementv therewith.

Bar 7, extends upwardly from casing 5, and terminates in a knurled head8, for adjustment. A set screw 9, is provided'in the up- Figure 1 is avertical central section of my l per end of casing 5, and its inner endbears against bar 7, to retain the same in its adjusted position, A capnut 10 is provided to give the device a more'n'ished appearance,

. and is screwed upon the ltop of casing 5, and

surrounds bar 7.

Mounted within spring chamber 6, is a pressure regulating coil spring11, the upper end of which bears against the lower end of bar 7, and thelower end rests upon the top.

of a pressure regulating piston 12, mounted to slide vertically in saidchamber. Projecting downwardly from the underside kof piston 12, is avalve stemv 13, the lower end of which terminates in avalve 14.Extending downwardly from the lower end of chamber 6,.is a valve chamber15, into whichV valve 14, and stem 13 project, which valve chamberterminates in an outlet chamber 16. Outlet chamber 16 is provided with acoupling or' connecting member 17, of anydesired construction. Extendinglongitudinally and centrally through short member 18, of casing 5, is aninlet port 19, the outer end of which is enlarged and has mountedtherein in the usual manner a Shrader valve 20. The inner endl of port19, connects with valve chamber'l. Mounted in valve chamber 15,immediately `-above port 19, is a valve seat 21, upon which valve 14,

'is adapted to seat normally. Extending threaded engagement with bar 7,and will act as a lock nut in lieu of set screw 9, of

the preferred form, and escape port 22, will be omitted. lnstead ofescape port 22, in this form lgperforate piston 12, by perforations 24,and provide an escape port 25, longitudinally through bar 7.

. n operation with an auto tire my device will first be screwed upon thenipple of the tire by member 17. The gage bar will be rotated to moveupor down -until the desired gage mark indicating the pressure desired,registers with the upperedge of nut 10. Pressure will then be admittedthrough the `Shrader valve in the usual manner and when the desiredpressure is reached any additional pressure will cause valve'lt to leaveits seat and allow theexcess pressure to escape through port 22.

Having described -Iny invention what ll claim isz- Y l. A pressureindicator and regulator comprising a casing substantially ll shapedin'vertical longitudinal section; av spring chamber in the upper end ofthe long leg of said casing; a longitudinally adjustable pressureregulating bar mounted in they upper end of said spring chamber in screwthreaded engagement with said casing and projecting upwardly therefromand terminating in a head; said bar having a portion of its oppositesides flattened, said flattened portions having indicia thereon forindicating the desired pressure; means projecting through said casingadapted to bear against said bar to prevent rotation thereof; an outletchamber in the lower end of said long leg; a coupling member mounted atone endf @in said outlet chamber and projecting downf'wardly therefrom;a valve chamber connect- `:ing vthe inner ends of said springvand outletVLchambers; an inlet passage extending longitudinally through `the shortleg of said casf ing and opening into said valve chamber, at 1 its innerend the other end opening to atmos- 35i phere; an inwardly opening checkvalve in the outer end of said inlet passage; a valve seat in said valvechamber above said inlet opening; a piston slidably mounted in the lowerend of said spring chamber; `a stem projecting downwardly from saidlpiston into the valve chamber; a valve Qn the lower end of said stemadapted toseat on said valve seat to close the opening therethrough; anda spring in said spring chamber: between saidipressure regulating barand the piston adapted to hold said valve seated until the indicatedpressure is reached.

2. A pressure indicator and regulator said bar to prevent rotationthereof; an outi let chamber in the lower end of said long leg; acoupling membenmounted at one end in said outlet chamber andprojectingfdownwardly therefrom; a valve chamber connecting the innerends of said spring and outlet chambers; an inlet valve chamber in theouter end of the other leg of said casing; an inwardly opening checkvalve in said last f valve chamber; an inlet passage connecting saidinlet valve chamber and said first mentioned valve chamber; a Valve seatin said valve chamber above 4said inlet opening; a' piston slidablymounted in the lower end of said spring chamber; a stem projectingdownwardly from said piston into the valve chamber; a valve on the lowerend of said stem adapted to seat on said valve seat to close the openingtherethrough; and aspring in'said spring chamber 'between said presisureregulating bar and the piston adapted to hold said valve seateduntil theindicated pressure is reached,

l WlLLllAM M. VON'SCK.

Witnesses: Y

EMIL MoNHor, E. Evnmrr'r BEAUsEJoUn.

